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Förvärma uteluften med bergvärme i ett FTX-system
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
2018 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesisAlternative title
Preheat the outdoor air with geothermal heat in an FTX-system (English)
Abstract [en]

This thesis is commissioned by HSB Norr in Umeå. The thesis work is conducted in spring 2018. The principal HSB is a member-owned company that owns and manages real estate around Sweden.

The property that the project includes is called Lyktgubben and is located on Tomtebo in Umeå. In the building there are 24 apartments, garage and shelters with an Atemp of 1780 sqm. The property has a heat demand of 146 kWh / sq.m. which is higher than the construction industry currently recommends for multi-family houses in Umeå. The heating system consists of district heating and in the ventilation system which consists of an FTX unit with a heating coil which is also powered by district heating.

The project has evaluated the possibilities of implementing preheating of outdoor air with geothermal heat in an FTX-system, also known as HSB-FTX in the Lyktgubben property, to see if it is cost-effective and what climate savings this can lead to.

The prerequisite for implementing HSB-FTX in the building is there. It is a good area for drilling for geothermal heat and there is room for attracting KB pipelines.

This investment is good for cutting power peaks, a large part of the power peaks are used to heat the outdoor air to the desired supply air temperature at cold outside temperatures. The power subscription could potentially be reduced by up to 40-50 kW at cold outdoor temperatures around -20 degrees Celsius.

The ventilation unit is old and a new one should be installed. With that said, the project has concluded that it is most profitable according to LCC is to drill three holes for HSB-FTX. As HSB-FTX is a costly investment, it results say that installing only a new unit has the lowest payback time.

Place, publisher, year, edition, pages
2018. , p. 29
Keywords [sv]
FTX-system, bergvärme
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:umu:diva-149325OAI: oai:DiVA.org:umu-149325DiVA, id: diva2:1221011
External cooperation
HSB
Subject / course
Energiteknik
Educational program
Bachelor of Science Programme in Energy Engineering
Supervisors
Examiners
Available from: 2018-06-20 Created: 2018-06-19 Last updated: 2018-06-19Bibliographically approved

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
More languages
Output format
  • html
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  • asciidoc
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